Remove the Windscreen wipers and scuttle panel, (see other answers for pictures). The Power Plug to the Windscreen washer motor can be removed by pulling out a metal clip. The washer motor pulls out backwards from the bottle, leaving a meshed grommet which is also the filter. Prise the grommet/filter from the washer bottle and clean it.
Paul
April 2011
If you need info on how to get at the pump contact me on nige110162(at symbol)hotmail.co.uk and I'll mail you the info
nigel
January 2010
you need to remove pump and you will find that where pump fits in grommet that it is also a filter,this will be bunged-up,especially if washing up liquid is used in bottle!
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.